Large Diameter Customize Domed Clear Borosilicate Glass Bell Cover Jar with Base

• Customization: Available
• After-sales Service: Yes
• Warranty: 1year
• Model NO.: HB-BJ
• Customized: Customized
• Structure: Portable
• Material: Glass
• Certification: ISO, RoHS
• Application: School, Hospital, Lab
• Type: for Show
• Made of: Quartz or Boro3.3
• Working Temperaturer: 600 Degree
• Purity: 80%
• Used: for Lab and Showing
• Max Diameter: 500mm
• Thickness: 1-8mm
• Density: 2.23
• Keyword1: Glass Bell Cover
• Keyword2: Bell Cover with Base
• Transport Package: Standard Export Package to Avoid Breaking
• Specification: CE, Rohs
• Trademark: HB
• Origin: Jiangsu
• Production Capacity: 100000/Month
• Package Size: 15.00cm * 20.00cm * 15.00cm
• Package Gross Weight: 0.500kg

Product Description

Product Description

Large Diameter Customize Domed Clear Borosilicate Glass Bell cover Jar with Base

A glass bell jar is a bell-shaped, transparent laboratory vessel typically manufactured from high-quality borosilicate glass. Designed with a smooth, ground bottom edge, it is specifically engineered to form an airtight vacuum seal when placed on a flat base plate and used with vacuum grease.

glass bell jar

Exceptional Chemical Resistance
Made from high-quality borosilicate glass (e.g., Pyrex), bell jars are resistant to most acids, bases, and organic solvents. Their non-porous surface prevents contamination, making them ideal for safely storing or testing delicate chemical samples without altering their composition.

Superior Optical Clarity
The high transparency of borosilicate glass provides unobstructed 360-degree visibility of internal contents. This makes them perfect for classroom demonstrations (e.g., sound propagation, vacuum effects) and precise scientific observations without needing to open the seal.

glass bell cover

Thermal Shock Resistance
Borosilicate glass has a low coefficient of thermal expansion, allowing bell jars to withstand rapid temperature changes ranging from -40°C to 300°C without cracking, suitable for varied environmental testing conditions.

Easy-to-Clean & Durable Surface
The smooth, non-porous glass interior is easy to wipe down or wash with standard laboratory detergents. Unlike plastic, it does not scratch easily, absorb odors, or degrade over repeated use, ensuring a long service life in the lab.

Technical Specifications

(Custom configurations available upon request.)

Property Content	Property Index
Density	2.23g/cm^3
Strain temperature	520℃
Annealing temperature	560℃
Softening temperature	820℃
the refractive index	1.47
Light transmittance(2mm)	92%
Elastic modulus	67KN/mm^2
Tensile strength	40-120N/mm^2
Thermal expansion coefficient(20-300℃)	3.3×10^−6K^−1
Specific heat	0.9J/g.K
Thermal conductivity	1.2W/m.K

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Reliable Fragile Product Packaging & Comprehensive Shipping Protection

Targeting the fragile, high-precision characteristics of industrial ceramic and quartz products, we adopt standardized export-grade shockproof packaging and professional global transportation solutions. Finished products go through independent wrapping, anti-collision foam filling and thickened carton or wooden box reinforcement, greatly reducing the risk of breakage, scratch and deformation during transit. We support customized brand packaging, exclusive shipping marks and standardized export packaging standards, and adapt to multiple transportation modes including sea freight, air freight and international express. With mature logistics docking experience and full-link cargo protection measures, we aim to improve the safety and integrity of product delivery for global industrial customers.

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FAQ

Q1: Can you provide exclusive customized solutions for special project demands? 
A1: Yes. In addition to conventional OEM and ODM customization, we can develop exclusive product structures, adjust technical parameters and optimize solutions according to special project standards, regional industry specifications and personalized buyer requirements, providing one-to-one customized technical support.
 
Q2: Do you support third-party factory inspection and product random testing? 
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Q3: How do you ensure on-time delivery for bulk orders? 
A3: We have a scientific production scheduling system and sufficient material reserve chain. According to order quantity and delivery cycle, we will formulate a detailed production plan, arrange special personnel to track progress in real time, and effectively avoid delivery delays to ensure stable and punctual shipment of bulk and urgent orders.
 
Q4: Why is your factory price more stable than trading companies? 
A4: As a direct manufacturer, we control all links from raw material procurement, production processing to finished product output. There is no intermediate markup, and we can adjust costs according to long-term cooperative orders, maintaining stable and transparent pricing for long-term strategic partners.
 
Q5: What customized service items can you support besides product structure? 
A5: Besides structural size and precision tolerance customization of industrial ceramic and quartz products, we support personalized services including custom deep processing, surface treatment, laser marking, custom packaging and technical document customization to meet different industrial and brand standards.